I agree that in many ways this classic adventure is somewhat atypical, especially when compared with the investigation heacy Tatters of the King. Lots of monsters, lots of action, lots of mortal danger. But, consider adapting it to the recent Pulp Cthulhu supplement. This far flinging adventure, that has you taking down a friggin rocket being built by evil mad-genius cultists in a volcano as a climax, is a perfect match in theme and content for Pulp Cthulhu. Personally, I upped the timeline to coincide with the 1934 eclipse, and juiced up a few encounters here and there, but it is pretty much ready to roll as a pulpy adventure.